# CLASS 8 Maths WORKSHEET ON UNDERSTANDING QUADRILATERALS

INDIAN SCHOOL MUSCAT – MIDDLE SECTION – DEPARTMENT OF MATHEMATICS –TERM :01 ( 2018 – 19 ) NAME OF THE STUDENT : DATE : 1...

INDIAN SCHOOL MUSCAT – MIDDLE SECTION – DEPARTMENT OF MATHEMATICS –TERM :01 ( 2018 – 19 ) NAME OF THE STUDENT : DATE : 10.05.2018

2

SUB: MATHEMATICS

S.NO 1

CLASS : 8 SEC :

WORKSHEET NO:02

ANSWER THE FOLLOWING QUESTIONS Find the sum of the exterior angles of a decagon. Find the number of diagonals in a polygon with 14 sides.

3

The interior angle of a regular polygon is four times its exterior angle. How many sides does the polygon have? Name the polygon.

4

Write two differences between rhombus and square.

5

In a parallelogram ABCD,  DAB = 75°. Find the measure of  DCB and  ABC

6

The angles of a quadrilateral are in the ratio3 : 4 : 6 : 7 .Find the measure of each angle. What type of quadrilateral is it?

7

Sum of the interior angles of a polygon is 1980°. Find the number of sides.

8 9 10

I am a special quadrilateral in which my two adjacent sides are 7cm each and the other two adjacent sides are 10cm each. Who am I? The point of intersection of diagonals of a quadrilateral divides one diagonal in the ratio 2: 3.Is it a parallelogram? Why or why not? Find the angles of a parallelogram if one angle is 30° less than twice its adjacent angle.

Find x in the given figure.

90°

90° 3x x

11 80° A 12

B

ABCD is a rectangle. If AM = 2y+5 and DM = 4y – 15 Find the length of each diagonal.

M D

C E

F 3a

13

EFGH is an isosceles trapezium. Find the values of a and b. H 6a

14 15

16

4b G

Find the sum of the interior angles of a regular polygon with each exterior angle of measure 45° One of the diagonals of a rhombus is 16cm. If the perimeter of the rhombus is 68 cm, fine the length of the other diagonal. D C

ABCD is a rhombus in which  ABD = 40° Find  BAC ,  BCD and  ADC

O A

B